Goodwill and Acquired Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table presents changes in the carrying amount of goodwill:

	For the Year Ended December 31,
(In thousands)	2021		2020		2019
Beginning of year	$	221,176	$	205,286	$	204,753
Changes from business combinations	30,978		15,890		533
Total	$	252,154	$	221,176	$	205,286

Schedule of Core Deposit Intangibles

The change in balance for CDI is as follows:

	For the Year Ended December 31,
(In thousands)	2021		2020		2019
Beginning of year	$	14,577	$	18,305	$	24,807
Acquired CDI, including measurement period adjustments	3,454		2,129		(676)
Amortization expense	(5,033)		(5,857)		(5,826)
End of year	$	12,998	$	14,577	$	18,305
(In months)
Remaining average amortization period for CDI	39		44		47

Gross Carrying Amount and Accumulated Amortization of Intangible Asset

The gross carrying amount and accumulated amortization of the Company's CDI subject to amortization as of:

	December 31, 2021				December 31, 2020
(In thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Core deposit intangible	$	41,596	$	(28,598)	$	38,144	$	(23,567)